12513021402 has 64 divisors (see below), whose sum is σ = 28988918784. Its totient is φ = 3526813440.

The previous prime is 12513021337. The next prime is 12513021419. The reversal of 12513021402 is 20412031521.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2741202 + ... + 2745762.

It is an arithmetic number, because the mean of its divisors is an integer number (452951856).

Almost surely, 2^12513021402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12513021402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14494459392).

12513021402 is an abundant number, since it is smaller than the sum of its proper divisors (16475897382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12513021402 is a wasteful number, since it uses less digits than its factorization.

12513021402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5443.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 12513021402 its reverse (20412031521), we get a palindrome (32925052923).

The spelling of 12513021402 in words is "twelve billion, five hundred thirteen million, twenty-one thousand, four hundred two".